Spool for looms and other textile machines



Dec. 24, 1929. P. FRH ET AL sPooL vFon Looms AND oTHER mmm: nAxuNEsFiled Oct. 3 1927 fg. s.

.fllllllll Patented Dec. 24, 1929 UNITED STATES PATENT OFFICE PETER FRHAND KARL BRAUN, F GAUTING, NEAR MUNICH, GERMANY; SAID' BRAUN ASSIGNQR T0SAID FRH SPOOL FOR LOOMS AND OTHER TEXTILE MACHINES Application filedOctober 3, 1927, Serial No.

We have led applications in Germany, January 5, 1926. F. 60,648, VH,86g, and August 17, 1926, F. 61,934.

Spools of light metal.` for looms and other textile machines, have insome cases'been provided with annular or helical, inwardly directedribs,'mad'e by indentation, for engaging the spindles on which thespools are placed. rlhese ribs are somewhat expensive to produce, andlack resilience, so that the spools are liable to bind on the spindlesand can only be withdrawn with diiliculty. Moreover, it is ditcult so toproduce them that uniform engagement with the spindle is obtained.

According to this invention these defects are overcome by making theribs extend lengthwise of the spool. lThey are then resilient, and inproducing the spool by a drawing process the ribs can readily be made toconform to the taper of the spool, so that uniform Contact with thespindle, throughout their length, is obtained. The lattenings Y due tothe indentations give the yarn a better hold than it has on a spoolwhich is circular throughout, and the usual grooves provided to preventthe slipping oi of the yarn may be dispensed with, or provided only atthe edges of the depressions made by the indentations forming the ribs.The latter may have slots, to increase their resilience, and tongues ofmetal may be bent inwards at their upper ends, to orm abutments for thetip or the spindle.

Three embodiments of the invention are shown in the accompanyingdrawing, in Figs. 1 and 2, Figs. 3 and 4 and Figs. 5 and 6 respectively;Figs. 1, 3 and 5 are vertical sections, and Figs. 2, 4 and 6 arecross-sections on the lines I-L II-II and III-lll respectively.

Referring rst to Figs. 1 and 2, a is the slightly tapered shank of thespool and b the foot thereof, these two parts being integral with cachother, and being produced by drawing a tubular blank of light metal, Atthe junction of the foot and shank there is a shoulder c. The shank hasthree inwardly directed, uniformly spaced vertlcal rms d made byindenting, these ribs coming into 50 contact with the spindle, andexerting resili- 223,614,21116. in Germany January 5, 1926.

ent pressure, which enables the spool to be drawn oft' the spindleeasily when required.`

`The shank may have external transverse grooves or shoulders :n at theedges ot the grooves formed by the indentations made for producing theribs d. y

In the embodiment shown in Figs. 3 and 4 the shank a1 has inwardlydirected longitudinal ribs d1, made by indentation, and at the upper endand the lower end of cach rib a transverse slot c' is made in theinwardly pressed portion of the metal, to increase the resilience of theribs. At the upper ends of the ribs (Z1 short tongues of metal are bentr inwards from 'the parts where the slots are made, and these formabutments limiting the extent to which the spool can slipv down thespindle. At their lower ends the ribs d1 have enlargements j, whichreduce the gaps between the ribs at this part, so that when the spool isslipped on to a spindle the tip of the spindle cannot enter the gapbetween two ribs and become jammed.

In the modification shown in Figs. 5 and 6 the shank a2 has`longitudinal, inwardly directed ribs cl2, each of which has a slot lextending lengthwise thereof, at its crest, the eiect orn these slotsbeing to increase the resilience of the ribs. Where the ribs d2terminate at the bottom a short, thin tube Z is nserted into the spool,to guide the spool when it is slipped on to the spindle and prevent thetip of the spindle from becoming jammed between two ribs.

The ribs may be discontinuous, that is to 85 say a series of short ribsd3, with gaps y be' tween them, may be substituted for a single rib, andthese shorter ribs may be placed out of direct alinement with eachother.

What we claim as our invention and de- 90 sire to secure by LettersPatent of the United States is 1. A bobbin of light metal, for textilemachnery, having a foot and a tubular shank, said shank havinglongitudinal, inwardly directed indentations forming ribs extendinginteriorly of the shank beyond its inner periphery, said ribs havingslots extending lengthwise thereof.

2. A bobbin of light metal, for textile lna- 10 ehinery, having a footand a. tubular shank,

said shank having longitudinal, inwardly directed ribs formed byindentations, and said shank having also inwardly bent tongues oflmetal, oneiat the upper end of each rib.

3. A bobbin of light metal, for textile machinery, having a foot and atubular shank, said shank having longitudinal, inwardly directed ribsformed by indentations, each of said ribs having lateral enlargements atits lower end.,

4. A bobbin of light metal for textile machinery, comprising a foot anda tubular shank, said shank having integral therewith longitudinallyextending inwardly directed imperfo'rated reenforcing ribs ofsubstantial length, adapted to yield under pressure.

In testimony whereof we hereunto aflix our signatures.

PETER FRUH. KARL BRAUN.

